proxyclient: Modify FreeBSD loader to use standard U-Boot bootefi cmd

The FreeBSD script added in #185 required patching u-boot since it specified the
loader base/size in a non-standard way. This changes the way arguments are
passed to the bootefi command so it works with the asahi u-boot fork which I've
been using. I also changed the case where the loader isn't specified to have
u-boot boot from the nvme since I have that driver functional enough to have it
mount the root fs now.

Signed-off-by: Ayrton Munoz <a.munoz3327@gmail.com>

proxyclient/tools/freebsd.py

@@ -86,9 +86,9 @@
 if loader is not None:
     # dtb_addr not used here, the prepared fdt's at a different location.  If
     # we use this one, we won't get any of our /chosen additions, for instance.
-    bootcmd = "distro_bootcmd=bootefi 0x%x - 0x%x" % (loader_base, loader_size)
+    bootcmd = "distro_bootcmd=bootefi 0x%x:0x%x" % (loader_base, loader_size)
 else:
-    bootcmd = "distro_bootcmd=devnum=0; run usb_boot"
+    bootcmd = "distro_bootcmd=devnum=0; run nvme_boot"
 
 if tty_dev is not None:
 	bootenv.append("baudrate=%d" % tty_dev.baudrate)